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EP0851356A3 - Multiprocessor computer system - Google Patents

Multiprocessor computer system Download PDF

Info

Publication number
EP0851356A3
EP0851356A3 EP97308077A EP97308077A EP0851356A3 EP 0851356 A3 EP0851356 A3 EP 0851356A3 EP 97308077 A EP97308077 A EP 97308077A EP 97308077 A EP97308077 A EP 97308077A EP 0851356 A3 EP0851356 A3 EP 0851356A3
Authority
EP
European Patent Office
Prior art keywords
memory
cache
lines
status information
shared
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP97308077A
Other languages
German (de)
French (fr)
Other versions
EP0851356A2 (en
Inventor
Gene F. Young
Larry C. James
Roy M. Stevens
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Intel Corp
Original Assignee
Intel Corp
NCR International Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Intel Corp, NCR International Inc filed Critical Intel Corp
Publication of EP0851356A2 publication Critical patent/EP0851356A2/en
Publication of EP0851356A3 publication Critical patent/EP0851356A3/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02—Addressing or allocation; Relocation
    • G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
    • G06F12/0802—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches
    • G06F12/0806—Multiuser, multiprocessor or multiprocessing cache systems
    • G06F12/0815—Cache consistency protocols
    • G06F12/0817—Cache consistency protocols using directory methods
    • G06F12/0826—Limited pointers directories; State-only directories without pointers
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02—Addressing or allocation; Relocation
    • G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
    • G06F12/0802—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches
    • G06F12/0806—Multiuser, multiprocessor or multiprocessing cache systems
    • G06F12/0813—Multiuser, multiprocessor or multiprocessing cache systems with a network or matrix configuration
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02—Addressing or allocation; Relocation
    • G06F12/08—Addressing or allocation; Relocation in hierarchically structured memory systems, e.g. virtual memory systems
    • G06F12/0802—Addressing of a memory level in which the access to the desired data or data block requires associative addressing means, e.g. caches
    • G06F12/0806—Multiuser, multiprocessor or multiprocessing cache systems
    • G06F12/0815—Cache consistency protocols
    • G06F12/0817—Cache consistency protocols using directory methods
    • G06F12/082—Associative directories

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Memory System Of A Hierarchy Structure (AREA)
  • Multi Processors (AREA)

Abstract

The present invention relates to a multiprocessor computer system having comprising a plurality of processors and a memory system including a system memory shared by the plurality of processors together with data cache memories, at least one data cache memory associated with each one of said processors.
The computer system employs a directory based cache coherency scheme for maintaining consistency between lines of data residing in the shared system memory and lines of data residing in the data cache memories. The coherency scheme depends on storing line status information for lines of the shared system memory. The provision for storing line status information comprises a state cache memory associated with the shared system memory to cache the memory line status information. The state cache memory is sized to store status information for a portion only of the memory lines in the shared system memory (e.g. one sixteenth of the memory lines in the shared system memory) and can be a direct mapped cache.
EP97308077A 1996-12-09 1997-10-13 Multiprocessor computer system Withdrawn EP0851356A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/762,636 US5848434A (en) 1996-12-09 1996-12-09 Method and apparatus for caching state information within a directory-based coherency memory system
US762636 1996-12-09

Publications (2)

Publication Number Publication Date
EP0851356A2 EP0851356A2 (en) 1998-07-01
EP0851356A3 true EP0851356A3 (en) 1999-12-22

Family

ID=25065660

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97308077A Withdrawn EP0851356A3 (en) 1996-12-09 1997-10-13 Multiprocessor computer system

Country Status (3)

Country Link
US (1) US5848434A (en)
EP (1) EP0851356A3 (en)
JP (1) JPH10240621A (en)

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US6055610A (en) * 1997-08-25 2000-04-25 Hewlett-Packard Company Distributed memory multiprocessor computer system with directory based cache coherency with ambiguous mapping of cached data to main-memory locations
DE69715203T2 (en) * 1997-10-10 2003-07-31 Bull S.A., Louveciennes A data processing system with cc-NUMA (cache coherent, non-uniform memory access) architecture and cache memory contained in local memory for remote access
US6085276A (en) * 1997-10-24 2000-07-04 Compaq Computers Corporation Multi-processor computer system having a data switch with simultaneous insertion buffers for eliminating arbitration interdependencies
US6052760A (en) * 1997-11-05 2000-04-18 Unisys Corporation Computer system including plural caches and utilizing access history or patterns to determine data ownership for efficient handling of software locks
US6070231A (en) * 1997-12-02 2000-05-30 Intel Corporation Method and apparatus for processing memory requests that require coherency transactions
US6625694B2 (en) * 1998-05-08 2003-09-23 Fujitsu Ltd. System and method for allocating a directory entry for use in multiprocessor-node data processing systems
US6226716B1 (en) * 1998-12-22 2001-05-01 Unisys Corporation Test driver for use in validating a circuit design
US6304945B1 (en) * 1999-05-13 2001-10-16 Compaq Computer Corporation Method and apparatus for maintaining cache coherency in a computer system having multiple processor buses
US6519685B1 (en) 1999-12-22 2003-02-11 Intel Corporation Cache states for multiprocessor cache coherency protocols
US6405292B1 (en) * 2000-01-04 2002-06-11 International Business Machines Corp. Split pending buffer with concurrent access of requests and responses to fully associative and indexed components
US6738836B1 (en) * 2000-08-31 2004-05-18 Hewlett-Packard Development Company, L.P. Scalable efficient I/O port protocol
US6633960B1 (en) * 2000-08-31 2003-10-14 Hewlett-Packard Development Company, L.P. Scalable directory based cache coherence protocol
US6868481B1 (en) * 2000-10-31 2005-03-15 Hewlett-Packard Development Company, L.P. Cache coherence protocol for a multiple bus multiprocessor system
US6779087B2 (en) * 2001-04-06 2004-08-17 Sun Microsystems, Inc. Method and apparatus for checkpointing to facilitate reliable execution
US7246303B2 (en) 2002-03-25 2007-07-17 Intel Corporation Error detection and recovery of data in striped channels
US7062592B2 (en) * 2002-03-25 2006-06-13 Intel Corporation Selecting a queue for service in a queuing system
US7324537B2 (en) * 2003-07-18 2008-01-29 Intel Corporation Switching device with asymmetric port speeds
US20050013251A1 (en) * 2003-07-18 2005-01-20 Hsuan-Wen Wang Flow control hub having scoreboard memory
US7080168B2 (en) * 2003-07-18 2006-07-18 Intel Corporation Maintaining aggregate data counts for flow controllable queues
US7570654B2 (en) * 2003-12-22 2009-08-04 Intel Corporation Switching device utilizing requests indicating cumulative amount of data
US7324541B2 (en) * 2003-12-22 2008-01-29 Intel Corporation Switching device utilizing internal priority assignments
US7623524B2 (en) * 2003-12-22 2009-11-24 Intel Corporation Scheduling system utilizing pointer perturbation mechanism to improve efficiency
US20050207436A1 (en) * 2004-03-18 2005-09-22 Anujan Varma Switching device based on aggregation of packets
US7676628B1 (en) * 2006-03-31 2010-03-09 Emc Corporation Methods, systems, and computer program products for providing access to shared storage by computing grids and clusters with large numbers of nodes
US7581068B2 (en) * 2006-06-29 2009-08-25 Intel Corporation Exclusive ownership snoop filter
US8473566B1 (en) 2006-06-30 2013-06-25 Emc Corporation Methods systems, and computer program products for managing quality-of-service associated with storage shared by computing grids and clusters with a plurality of nodes
US20080065837A1 (en) * 2006-09-07 2008-03-13 Sodick Co., Ltd. Computerized numerical control system with human interface using low cost shared memory
US20080159145A1 (en) * 2006-12-29 2008-07-03 Raman Muthukrishnan Weighted bandwidth switching device
CN103544269B (en) * 2013-10-17 2017-02-01 华为技术有限公司 Methods and node controllers for storing and enquiring directories
CN107003932B (en) 2014-09-29 2020-01-10 华为技术有限公司 Cache directory processing method and directory controller of multi-core processor system

Citations (1)

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EP0681240A2 (en) * 1994-05-03 1995-11-08 Hewlett-Packard Company Duplicate cache tag memory system

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US4394731A (en) * 1980-11-10 1983-07-19 International Business Machines Corporation Cache storage line shareability control for a multiprocessor system
US4410944A (en) * 1981-03-24 1983-10-18 Burroughs Corporation Apparatus and method for maintaining cache memory integrity in a shared memory environment
US4775955A (en) * 1985-10-30 1988-10-04 International Business Machines Corporation Cache coherence mechanism based on locking
US5317716A (en) * 1988-08-16 1994-05-31 International Business Machines Corporation Multiple caches using state information indicating if cache line was previously modified and type of access rights granted to assign access rights to cache line
US4928225A (en) * 1988-08-25 1990-05-22 Edgcore Technology, Inc. Coherent cache structures and methods
JPH0680499B2 (en) * 1989-01-13 1994-10-12 インターナショナル・ビジネス・マシーンズ・コーポレーション Cache control system and method for multiprocessor system
JP2825906B2 (en) * 1990-02-01 1998-11-18 株式会社日立製作所 Computer system
US5265232A (en) * 1991-04-03 1993-11-23 International Business Machines Corporation Coherence control by data invalidation in selected processor caches without broadcasting to processor caches not having the data
US5313609A (en) * 1991-05-23 1994-05-17 International Business Machines Corporation Optimum write-back strategy for directory-based cache coherence protocols
US5398325A (en) * 1992-05-07 1995-03-14 Sun Microsystems, Inc. Methods and apparatus for improving cache consistency using a single copy of a cache tag memory in multiple processor computer systems
US5450563A (en) * 1992-10-30 1995-09-12 International Business Machines Corporation Storage protection keys in two level cache system
US5394555A (en) * 1992-12-23 1995-02-28 Bull Hn Information Systems Inc. Multi-node cluster computer system incorporating an external coherency unit at each node to insure integrity of information stored in a shared, distributed memory
JPH07129468A (en) * 1993-11-04 1995-05-19 Matsushita Electric Ind Co Ltd Main memory controller

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EP0681240A2 (en) * 1994-05-03 1995-11-08 Hewlett-Packard Company Duplicate cache tag memory system

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"ASSOCIATIVE SCHEME FOR CACHE COHERENCE IN MULTI-PROCESSORS", IBM TECHNICAL DISCLOSURE BULLETIN, vol. 39, no. 5, 1 May 1996 (1996-05-01), pages 153 - 156, XP000584090, ISSN: 0018-8689 *
DUBNICKI C ET AL: "ADJUSTABLE BLOCK SIZE COHERENT CACHES", COMPUTER ARCHITECTURE NEWS, vol. 20, no. 2, 1 May 1992 (1992-05-01), pages 170 - 180, XP000277764, ISSN: 0163-5964 *
LILJA D J ET AL: "A SUPERASSOCIATIVE TAGGED CACHE COHERENCE DIRECTORY", PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON COMPUTER DESIGN: VLS IN COMPUTERS AND PROCESSORS, CAMBRIDGE, MA., OCT. 10 - 12, 1994, 10 October 1994 (1994-10-10), INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, pages 42 - 45, XP000488870, ISBN: 0-8186-6567-X *

Also Published As

Publication number Publication date
EP0851356A2 (en) 1998-07-01
JPH10240621A (en) 1998-09-11
US5848434A (en) 1998-12-08

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